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1/* vi: set sw=4 ts=4: */
2/*
3 * nfsmount.c -- Linux NFS mount
4 * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
17 * numbers to be specified on the command line.
18 *
19 * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
20 * Omit the call to connect() for Linux version 1.3.11 or later.
21 *
22 * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
23 * Implemented the "bg", "fg" and "retry" mount options for NFS.
24 *
25 * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
26 * - added Native Language Support
27 *
28 * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
29 * plus NFSv3 stuff.
30 */
31
32/*
33 * nfsmount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp
34 */
35
36#include <unistd.h>
37#include <stdio.h>
38#include <string.h>
39#include <errno.h>
40#include <netdb.h>
41#include <sys/socket.h>
42#include <time.h>
43#include <sys/utsname.h>
44#include <netinet/in.h>
45#include <arpa/inet.h>
46#include <stdlib.h>
47#include "busybox.h"
48#undef TRUE
49#undef FALSE
50#include <rpc/rpc.h>
51#include <rpc/pmap_prot.h>
52#include <rpc/pmap_clnt.h>
53#include <linux/nfs.h> /* For the kernels nfs stuff */
54#include "nfsmount.h"
55
56#ifndef NFS_FHSIZE
57static const int NFS_FHSIZE = 32;
58#endif
59#ifndef NFS_PORT
60static const int NFS_PORT = 2049;
61#endif
62
63/* Disable the nls stuff */
64# undef bindtextdomain
65# define bindtextdomain(Domain, Directory) /* empty */
66# undef textdomain
67# define textdomain(Domain) /* empty */
68# define _(Text) (Text)
69# define N_(Text) (Text)
70
71static const int MS_MGC_VAL = 0xc0ed0000; /* Magic number indicatng "new" flags */
72static const int MS_RDONLY = 1; /* Mount read-only */
73static const int MS_NOSUID = 2; /* Ignore suid and sgid bits */
74static const int MS_NODEV = 4; /* Disallow access to device special files */
75static const int MS_NOEXEC = 8; /* Disallow program execution */
76static const int MS_SYNCHRONOUS = 16; /* Writes are synced at once */
77static const int MS_REMOUNT = 32; /* Alter flags of a mounted FS */
78static const int MS_MANDLOCK = 64; /* Allow mandatory locks on an FS */
79static const int S_QUOTA = 128; /* Quota initialized for file/directory/symlink */
80static const int S_APPEND = 256; /* Append-only file */
81static const int S_IMMUTABLE = 512; /* Immutable file */
82static const int MS_NOATIME = 1024; /* Do not update access times. */
83static const int MS_NODIRATIME = 2048; /* Do not update directory access times */
84
85
86/*
87 * We want to be able to compile mount on old kernels in such a way
88 * that the binary will work well on more recent kernels.
89 * Thus, if necessary we teach nfsmount.c the structure of new fields
90 * that will come later.
91 *
92 * Moreover, the new kernel includes conflict with glibc includes
93 * so it is easiest to ignore the kernel altogether (at compile time).
94 */
95
96/* NOTE: Do not make this into a 'static const int' because the pre-processor
97 * needs to test this value in some #if statements. */
98#define NFS_MOUNT_VERSION 4
99
100struct nfs2_fh {
101 char data[32];
102};
103struct nfs3_fh {
104 unsigned short size;
105 unsigned char data[64];
106};
107
108struct nfs_mount_data {
109 int version; /* 1 */
110 int fd; /* 1 */
111 struct nfs2_fh old_root; /* 1 */
112 int flags; /* 1 */
113 int rsize; /* 1 */
114 int wsize; /* 1 */
115 int timeo; /* 1 */
116 int retrans; /* 1 */
117 int acregmin; /* 1 */
118 int acregmax; /* 1 */
119 int acdirmin; /* 1 */
120 int acdirmax; /* 1 */
121 struct sockaddr_in addr; /* 1 */
122 char hostname[256]; /* 1 */
123 int namlen; /* 2 */
124 unsigned int bsize; /* 3 */
125 struct nfs3_fh root; /* 4 */
126};
127
128/* bits in the flags field */
129
130static const int NFS_MOUNT_SOFT = 0x0001; /* 1 */
131static const int NFS_MOUNT_INTR = 0x0002; /* 1 */
132static const int NFS_MOUNT_SECURE = 0x0004; /* 1 */
133static const int NFS_MOUNT_POSIX = 0x0008; /* 1 */
134static const int NFS_MOUNT_NOCTO = 0x0010; /* 1 */
135static const int NFS_MOUNT_NOAC = 0x0020; /* 1 */
136static const int NFS_MOUNT_TCP = 0x0040; /* 2 */
137static const int NFS_MOUNT_VER3 = 0x0080; /* 3 */
138static const int NFS_MOUNT_KERBEROS = 0x0100; /* 3 */
139static const int NFS_MOUNT_NONLM = 0x0200; /* 3 */
140
141
142#define UTIL_LINUX_VERSION "2.10m"
143#define util_linux_version "util-linux-2.10m"
144
145#define HAVE_inet_aton
146#define HAVE_scsi_h
147#define HAVE_blkpg_h
148#define HAVE_kd_h
149#define HAVE_termcap
150#define HAVE_locale_h
151#define HAVE_libintl_h
152#define ENABLE_NLS
153#define HAVE_langinfo_h
154#define HAVE_progname
155#define HAVE_openpty
156#define HAVE_nanosleep
157#define HAVE_personality
158#define HAVE_tm_gmtoff
159
160static char *nfs_strerror(int status);
161
162#define MAKE_VERSION(p,q,r) (65536*(p) + 256*(q) + (r))
163#define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
164
165static const int EX_FAIL = 32; /* mount failure */
166static const int EX_BG = 256; /* retry in background (internal only) */
167
168
169/*
170 * nfs_mount_version according to the sources seen at compile time.
171 */
172static int nfs_mount_version;
173
174/*
175 * Unfortunately, the kernel prints annoying console messages
176 * in case of an unexpected nfs mount version (instead of
177 * just returning some error). Therefore we'll have to try
178 * and figure out what version the kernel expects.
179 *
180 * Variables:
181 * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time
182 * NFS_MOUNT_VERSION: these nfsmount sources at compile time
183 * nfs_mount_version: version this source and running kernel can handle
184 */
185static void
186find_kernel_nfs_mount_version(void)
187{
188 static int kernel_version = 0;
189
190 if (kernel_version)
191 return;
192
193 nfs_mount_version = NFS_MOUNT_VERSION; /* default */
194
195 kernel_version = get_kernel_revision();
196 if (kernel_version) {
197 if (kernel_version < MAKE_VERSION(2,1,32))
198 nfs_mount_version = 1;
199 else if (kernel_version < MAKE_VERSION(2,2,18) ||
200 (kernel_version >= MAKE_VERSION(2,3,0) &&
201 kernel_version < MAKE_VERSION(2,3,99)))
202 nfs_mount_version = 3;
203 else
204 nfs_mount_version = 4; /* since 2.3.99pre4 */
205 }
206 if (nfs_mount_version > NFS_MOUNT_VERSION)
207 nfs_mount_version = NFS_MOUNT_VERSION;
208}
209
210static struct pmap *
211get_mountport(struct sockaddr_in *server_addr,
212 long unsigned prog,
213 long unsigned version,
214 long unsigned proto,
215 long unsigned port)
216{
217struct pmaplist *pmap;
218static struct pmap p = {0, 0, 0, 0};
219
220server_addr->sin_port = PMAPPORT;
221pmap = pmap_getmaps(server_addr);
222
223if (version > MAX_NFSPROT)
224 version = MAX_NFSPROT;
225if (!prog)
226 prog = MOUNTPROG;
227p.pm_prog = prog;
228p.pm_vers = version;
229p.pm_prot = proto;
230p.pm_port = port;
231
232while (pmap) {
233 if (pmap->pml_map.pm_prog != prog)
234 goto next;
235 if (!version && p.pm_vers > pmap->pml_map.pm_vers)
236 goto next;
237 if (version > 2 && pmap->pml_map.pm_vers != version)
238 goto next;
239 if (version && version <= 2 && pmap->pml_map.pm_vers > 2)
240 goto next;
241 if (pmap->pml_map.pm_vers > MAX_NFSPROT ||
242 (proto && p.pm_prot && pmap->pml_map.pm_prot != proto) ||
243 (port && pmap->pml_map.pm_port != port))
244 goto next;
245 memcpy(&p, &pmap->pml_map, sizeof(p));
246next:
247 pmap = pmap->pml_next;
248}
249if (!p.pm_vers)
250 p.pm_vers = MOUNTVERS;
251if (!p.pm_port)
252 p.pm_port = MOUNTPORT;
253if (!p.pm_prot)
254 p.pm_prot = IPPROTO_TCP;
255return &p;
256}
257
258int nfsmount(const char *spec, const char *node, int *flags,
259 char **extra_opts, char **mount_opts, int running_bg)
260{
261 static char *prev_bg_host;
262 char hostdir[1024];
263 CLIENT *mclient;
264 char *hostname;
265 char *pathname;
266 char *old_opts;
267 char *mounthost=NULL;
268 char new_opts[1024];
269 struct timeval total_timeout;
270 enum clnt_stat clnt_stat;
271 static struct nfs_mount_data data;
272 char *opt, *opteq;
273 int val;
274 struct hostent *hp;
275 struct sockaddr_in server_addr;
276 struct sockaddr_in mount_server_addr;
277 struct pmap* pm_mnt;
278 int msock, fsock;
279 struct timeval retry_timeout;
280 union {
281 struct fhstatus nfsv2;
282 struct mountres3 nfsv3;
283 } status;
284 struct stat statbuf;
285 char *s;
286 int port;
287 int mountport;
288 int proto;
289 int bg;
290 int soft;
291 int intr;
292 int posix;
293 int nocto;
294 int noac;
295 int nolock;
296 int retry;
297 int tcp;
298 int mountprog;
299 int mountvers;
300 int nfsprog;
301 int nfsvers;
302 int retval;
303 time_t t;
304 time_t prevt;
305 time_t timeout;
306
307 find_kernel_nfs_mount_version();
308
309 retval = EX_FAIL;
310 msock = fsock = -1;
311 mclient = NULL;
312 if (strlen(spec) >= sizeof(hostdir)) {
313 error_msg("excessively long host:dir argument");
314 goto fail;
315 }
316 strcpy(hostdir, spec);
317 if ((s = strchr(hostdir, ':'))) {
318 hostname = hostdir;
319 pathname = s + 1;
320 *s = '\0';
321 /* Ignore all but first hostname in replicated mounts
322 until they can be fully supported. (mack@sgi.com) */
323 if ((s = strchr(hostdir, ','))) {
324 *s = '\0';
325 error_msg("warning: multiple hostnames not supported");
326 }
327 } else {
328 error_msg("directory to mount not in host:dir format");
329 goto fail;
330 }
331
332 server_addr.sin_family = AF_INET;
333#ifdef HAVE_inet_aton
334 if (!inet_aton(hostname, &server_addr.sin_addr))
335#endif
336 {
337 if ((hp = gethostbyname(hostname)) == NULL) {
338 herror_msg("%s", hostname);
339 goto fail;
340 } else {
341 if (hp->h_length > sizeof(struct in_addr)) {
342 error_msg("got bad hp->h_length");
343 hp->h_length = sizeof(struct in_addr);
344 }
345 memcpy(&server_addr.sin_addr,
346 hp->h_addr, hp->h_length);
347 }
348 }
349
350 memcpy (&mount_server_addr, &server_addr, sizeof (mount_server_addr));
351
352 /* add IP address to mtab options for use when unmounting */
353
354 s = inet_ntoa(server_addr.sin_addr);
355 old_opts = *extra_opts;
356 if (!old_opts)
357 old_opts = "";
358 if (strlen(old_opts) + strlen(s) + 10 >= sizeof(new_opts)) {
359 error_msg("excessively long option argument");
360 goto fail;
361 }
362 sprintf(new_opts, "%s%saddr=%s",
363 old_opts, *old_opts ? "," : "", s);
364 *extra_opts = xstrdup(new_opts);
365
366 /* Set default options.
367 * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
368 * let the kernel decide.
369 * timeo is filled in after we know whether it'll be TCP or UDP. */
370 memset(&data, 0, sizeof(data));
371 data.retrans = 3;
372 data.acregmin = 3;
373 data.acregmax = 60;
374 data.acdirmin = 30;
375 data.acdirmax = 60;
376#if NFS_MOUNT_VERSION >= 2
377 data.namlen = NAME_MAX;
378#endif
379
380 bg = 0;
381 soft = 0;
382 intr = 0;
383 posix = 0;
384 nocto = 0;
385 nolock = 0;
386 noac = 0;
387 retry = 10000; /* 10000 minutes ~ 1 week */
388 tcp = 0;
389
390 mountprog = MOUNTPROG;
391 mountvers = 0;
392 port = 0;
393 mountport = 0;
394 nfsprog = NFS_PROGRAM;
395 nfsvers = 0;
396
397 /* parse options */
398
399 for (opt = strtok(old_opts, ","); opt; opt = strtok(NULL, ",")) {
400 if ((opteq = strchr(opt, '='))) {
401 val = atoi(opteq + 1);
402 *opteq = '\0';
403 if (!strcmp(opt, "rsize"))
404 data.rsize = val;
405 else if (!strcmp(opt, "wsize"))
406 data.wsize = val;
407 else if (!strcmp(opt, "timeo"))
408 data.timeo = val;
409 else if (!strcmp(opt, "retrans"))
410 data.retrans = val;
411 else if (!strcmp(opt, "acregmin"))
412 data.acregmin = val;
413 else if (!strcmp(opt, "acregmax"))
414 data.acregmax = val;
415 else if (!strcmp(opt, "acdirmin"))
416 data.acdirmin = val;
417 else if (!strcmp(opt, "acdirmax"))
418 data.acdirmax = val;
419 else if (!strcmp(opt, "actimeo")) {
420 data.acregmin = val;
421 data.acregmax = val;
422 data.acdirmin = val;
423 data.acdirmax = val;
424 }
425 else if (!strcmp(opt, "retry"))
426 retry = val;
427 else if (!strcmp(opt, "port"))
428 port = val;
429 else if (!strcmp(opt, "mountport"))
430 mountport = val;
431 else if (!strcmp(opt, "mounthost"))
432 mounthost=xstrndup(opteq+1,
433 strcspn(opteq+1," \t\n\r,"));
434 else if (!strcmp(opt, "mountprog"))
435 mountprog = val;
436 else if (!strcmp(opt, "mountvers"))
437 mountvers = val;
438 else if (!strcmp(opt, "nfsprog"))
439 nfsprog = val;
440 else if (!strcmp(opt, "nfsvers") ||
441 !strcmp(opt, "vers"))
442 nfsvers = val;
443 else if (!strcmp(opt, "proto")) {
444 if (!strncmp(opteq+1, "tcp", 3))
445 tcp = 1;
446 else if (!strncmp(opteq+1, "udp", 3))
447 tcp = 0;
448 else
449 printf(_("Warning: Unrecognized proto= option.\n"));
450 } else if (!strcmp(opt, "namlen")) {
451#if NFS_MOUNT_VERSION >= 2
452 if (nfs_mount_version >= 2)
453 data.namlen = val;
454 else
455#endif
456 printf(_("Warning: Option namlen is not supported.\n"));
457 } else if (!strcmp(opt, "addr"))
458 /* ignore */;
459 else {
460 printf(_("unknown nfs mount parameter: "
461 "%s=%d\n"), opt, val);
462 goto fail;
463 }
464 }
465 else {
466 val = 1;
467 if (!strncmp(opt, "no", 2)) {
468 val = 0;
469 opt += 2;
470 }
471 if (!strcmp(opt, "bg"))
472 bg = val;
473 else if (!strcmp(opt, "fg"))
474 bg = !val;
475 else if (!strcmp(opt, "soft"))
476 soft = val;
477 else if (!strcmp(opt, "hard"))
478 soft = !val;
479 else if (!strcmp(opt, "intr"))
480 intr = val;
481 else if (!strcmp(opt, "posix"))
482 posix = val;
483 else if (!strcmp(opt, "cto"))
484 nocto = !val;
485 else if (!strcmp(opt, "ac"))
486 noac = !val;
487 else if (!strcmp(opt, "tcp"))
488 tcp = val;
489 else if (!strcmp(opt, "udp"))
490 tcp = !val;
491 else if (!strcmp(opt, "lock")) {
492 if (nfs_mount_version >= 3)
493 nolock = !val;
494 else
495 printf(_("Warning: option nolock is not supported.\n"));
496 } else {
497 printf(_("unknown nfs mount option: "
498 "%s%s\n"), val ? "" : "no", opt);
499 goto fail;
500 }
501 }
502 }
503 proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP;
504
505 data.flags = (soft ? NFS_MOUNT_SOFT : 0)
506 | (intr ? NFS_MOUNT_INTR : 0)
507 | (posix ? NFS_MOUNT_POSIX : 0)
508 | (nocto ? NFS_MOUNT_NOCTO : 0)
509 | (noac ? NFS_MOUNT_NOAC : 0);
510#if NFS_MOUNT_VERSION >= 2
511 if (nfs_mount_version >= 2)
512 data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
513#endif
514#if NFS_MOUNT_VERSION >= 3
515 if (nfs_mount_version >= 3)
516 data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
517#endif
518 if (nfsvers > MAX_NFSPROT) {
519 error_msg("NFSv%d not supported!", nfsvers);
520 return 0;
521 }
522 if (mountvers > MAX_NFSPROT) {
523 error_msg("NFSv%d not supported!", nfsvers);
524 return 0;
525 }
526 if (nfsvers && !mountvers)
527 mountvers = (nfsvers < 3) ? 1 : nfsvers;
528 if (nfsvers && nfsvers < mountvers) {
529 mountvers = nfsvers;
530 }
531
532 /* Adjust options if none specified */
533 if (!data.timeo)
534 data.timeo = tcp ? 70 : 7;
535
536#ifdef NFS_MOUNT_DEBUG
537 printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
538 data.rsize, data.wsize, data.timeo, data.retrans);
539 printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n",
540 data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
541 printf("port = %d, bg = %d, retry = %d, flags = %.8x\n",
542 port, bg, retry, data.flags);
543 printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n",
544 mountprog, mountvers, nfsprog, nfsvers);
545 printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d\n",
546 (data.flags & NFS_MOUNT_SOFT) != 0,
547 (data.flags & NFS_MOUNT_INTR) != 0,
548 (data.flags & NFS_MOUNT_POSIX) != 0,
549 (data.flags & NFS_MOUNT_NOCTO) != 0,
550 (data.flags & NFS_MOUNT_NOAC) != 0);
551#if NFS_MOUNT_VERSION >= 2
552 printf("tcp = %d\n",
553 (data.flags & NFS_MOUNT_TCP) != 0);
554#endif
555#endif
556
557 data.version = nfs_mount_version;
558 *mount_opts = (char *) &data;
559
560 if (*flags & MS_REMOUNT)
561 return 0;
562
563 /*
564 * If the previous mount operation on the same host was
565 * backgrounded, and the "bg" for this mount is also set,
566 * give up immediately, to avoid the initial timeout.
567 */
568 if (bg && !running_bg &&
569 prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
570 if (retry > 0)
571 retval = EX_BG;
572 return retval;
573 }
574
575 /* create mount deamon client */
576 /* See if the nfs host = mount host. */
577 if (mounthost) {
578 if (mounthost[0] >= '0' && mounthost[0] <= '9') {
579 mount_server_addr.sin_family = AF_INET;
580 mount_server_addr.sin_addr.s_addr = inet_addr(hostname);
581 } else {
582 if ((hp = gethostbyname(mounthost)) == NULL) {
583 herror_msg("%s", mounthost);
584 goto fail;
585 } else {
586 if (hp->h_length > sizeof(struct in_addr)) {
587 error_msg("got bad hp->h_length?");
588 hp->h_length = sizeof(struct in_addr);
589 }
590 mount_server_addr.sin_family = AF_INET;
591 memcpy(&mount_server_addr.sin_addr,
592 hp->h_addr, hp->h_length);
593 }
594 }
595 }
596
597 /*
598 * The following loop implements the mount retries. On the first
599 * call, "running_bg" is 0. When the mount times out, and the
600 * "bg" option is set, the exit status EX_BG will be returned.
601 * For a backgrounded mount, there will be a second call by the
602 * child process with "running_bg" set to 1.
603 *
604 * The case where the mount point is not present and the "bg"
605 * option is set, is treated as a timeout. This is done to
606 * support nested mounts.
607 *
608 * The "retry" count specified by the user is the number of
609 * minutes to retry before giving up.
610 *
611 * Only the first error message will be displayed.
612 */
613 retry_timeout.tv_sec = 3;
614 retry_timeout.tv_usec = 0;
615 total_timeout.tv_sec = 20;
616 total_timeout.tv_usec = 0;
617 timeout = time(NULL) + 60 * retry;
618 prevt = 0;
619 t = 30;
620 val = 1;
621 for (;;) {
622 if (bg && stat(node, &statbuf) == -1) {
623 if (running_bg) {
624 sleep(val); /* 1, 2, 4, 8, 16, 30, ... */
625 val *= 2;
626 if (val > 30)
627 val = 30;
628 }
629 } else {
630 /* be careful not to use too many CPU cycles */
631 if (t - prevt < 30)
632 sleep(30);
633
634 pm_mnt = get_mountport(&mount_server_addr,
635 mountprog,
636 mountvers,
637 proto,
638 mountport);
639
640 /* contact the mount daemon via TCP */
641 mount_server_addr.sin_port = htons(pm_mnt->pm_port);
642 msock = RPC_ANYSOCK;
643
644 switch (pm_mnt->pm_prot) {
645 case IPPROTO_UDP:
646 mclient = clntudp_create(&mount_server_addr,
647 pm_mnt->pm_prog,
648 pm_mnt->pm_vers,
649 retry_timeout,
650 &msock);
651 if (mclient)
652 break;
653 mount_server_addr.sin_port = htons(pm_mnt->pm_port);
654 msock = RPC_ANYSOCK;
655 case IPPROTO_TCP:
656 mclient = clnttcp_create(&mount_server_addr,
657 pm_mnt->pm_prog,
658 pm_mnt->pm_vers,
659 &msock, 0, 0);
660 break;
661 default:
662 mclient = 0;
663 }
664 if (mclient) {
665 /* try to mount hostname:pathname */
666 mclient->cl_auth = authunix_create_default();
667
668 /* make pointers in xdr_mountres3 NULL so
669 * that xdr_array allocates memory for us
670 */
671 memset(&status, 0, sizeof(status));
672
673 if (pm_mnt->pm_vers == 3)
674 clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT,
675 (xdrproc_t) xdr_dirpath,
676 (caddr_t) &pathname,
677 (xdrproc_t) xdr_mountres3,
678 (caddr_t) &status,
679 total_timeout);
680 else
681 clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
682 (xdrproc_t) xdr_dirpath,
683 (caddr_t) &pathname,
684 (xdrproc_t) xdr_fhstatus,
685 (caddr_t) &status,
686 total_timeout);
687
688 if (clnt_stat == RPC_SUCCESS)
689 break; /* we're done */
690 if (errno != ECONNREFUSED) {
691 clnt_perror(mclient, "mount");
692 goto fail; /* don't retry */
693 }
694 if (!running_bg && prevt == 0)
695 clnt_perror(mclient, "mount");
696 auth_destroy(mclient->cl_auth);
697 clnt_destroy(mclient);
698 mclient = 0;
699 close(msock);
700 } else {
701 if (!running_bg && prevt == 0)
702 clnt_pcreateerror("mount");
703 }
704 prevt = t;
705 }
706 if (!bg)
707 goto fail;
708 if (!running_bg) {
709 prev_bg_host = xstrdup(hostname);
710 if (retry > 0)
711 retval = EX_BG;
712 goto fail;
713 }
714 t = time(NULL);
715 if (t >= timeout)
716 goto fail;
717 }
718 nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers;
719
720 if (nfsvers == 2) {
721 if (status.nfsv2.fhs_status != 0) {
722 error_msg("%s:%s failed, reason given by server: %s",
723 hostname, pathname,
724 nfs_strerror(status.nfsv2.fhs_status));
725 goto fail;
726 }
727 memcpy(data.root.data,
728 (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
729 NFS_FHSIZE);
730#if NFS_MOUNT_VERSION >= 4
731 data.root.size = NFS_FHSIZE;
732 memcpy(data.old_root.data,
733 (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
734 NFS_FHSIZE);
735#endif
736 } else {
737#if NFS_MOUNT_VERSION >= 4
738 fhandle3 *my_fhandle;
739 if (status.nfsv3.fhs_status != 0) {
740 error_msg("%s:%s failed, reason given by server: %s",
741 hostname, pathname,
742 nfs_strerror(status.nfsv3.fhs_status));
743 goto fail;
744 }
745 my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle;
746 memset(data.old_root.data, 0, NFS_FHSIZE);
747 memset(&data.root, 0, sizeof(data.root));
748 data.root.size = my_fhandle->fhandle3_len;
749 memcpy(data.root.data,
750 (char *) my_fhandle->fhandle3_val,
751 my_fhandle->fhandle3_len);
752
753 data.flags |= NFS_MOUNT_VER3;
754#endif
755 }
756
757 /* create nfs socket for kernel */
758
759 if (tcp) {
760 if (nfs_mount_version < 3) {
761 printf(_("NFS over TCP is not supported.\n"));
762 goto fail;
763 }
764 fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
765 } else
766 fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
767 if (fsock < 0) {
768 perror(_("nfs socket"));
769 goto fail;
770 }
771 if (bindresvport(fsock, 0) < 0) {
772 perror(_("nfs bindresvport"));
773 goto fail;
774 }
775 if (port == 0) {
776 server_addr.sin_port = PMAPPORT;
777 port = pmap_getport(&server_addr, nfsprog, nfsvers,
778 tcp ? IPPROTO_TCP : IPPROTO_UDP);
779 if (port == 0)
780 port = NFS_PORT;
781#ifdef NFS_MOUNT_DEBUG
782 else
783 printf(_("used portmapper to find NFS port\n"));
784#endif
785 }
786#ifdef NFS_MOUNT_DEBUG
787 printf(_("using port %d for nfs deamon\n"), port);
788#endif
789 server_addr.sin_port = htons(port);
790 /*
791 * connect() the socket for kernels 1.3.10 and below only,
792 * to avoid problems with multihomed hosts.
793 * --Swen
794 */
795 if (get_kernel_revision() <= 66314
796 && connect(fsock, (struct sockaddr *) &server_addr,
797 sizeof (server_addr)) < 0) {
798 perror(_("nfs connect"));
799 goto fail;
800 }
801
802 /* prepare data structure for kernel */
803
804 data.fd = fsock;
805 memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
806 strncpy(data.hostname, hostname, sizeof(data.hostname));
807
808 /* clean up */
809
810 auth_destroy(mclient->cl_auth);
811 clnt_destroy(mclient);
812 close(msock);
813 return 0;
814
815 /* abort */
816
817fail:
818 if (msock != -1) {
819 if (mclient) {
820 auth_destroy(mclient->cl_auth);
821 clnt_destroy(mclient);
822 }
823 close(msock);
824 }
825 if (fsock != -1)
826 close(fsock);
827 return retval;
828}
829
830/*
831 * We need to translate between nfs status return values and
832 * the local errno values which may not be the same.
833 *
834 * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
835 * "after #include <errno.h> the symbol errno is reserved for any use,
836 * it cannot even be used as a struct tag or field name".
837 */
838
839#ifndef EDQUOT
840#define EDQUOT ENOSPC
841#endif
842
843static struct {
844 enum nfs_stat stat;
845 int errnum;
846} nfs_errtbl[] = {
847 { NFS_OK, 0 },
848 { NFSERR_PERM, EPERM },
849 { NFSERR_NOENT, ENOENT },
850 { NFSERR_IO, EIO },
851 { NFSERR_NXIO, ENXIO },
852 { NFSERR_ACCES, EACCES },
853 { NFSERR_EXIST, EEXIST },
854 { NFSERR_NODEV, ENODEV },
855 { NFSERR_NOTDIR, ENOTDIR },
856 { NFSERR_ISDIR, EISDIR },
857#ifdef NFSERR_INVAL
858 { NFSERR_INVAL, EINVAL }, /* that Sun forgot */
859#endif
860 { NFSERR_FBIG, EFBIG },
861 { NFSERR_NOSPC, ENOSPC },
862 { NFSERR_ROFS, EROFS },
863 { NFSERR_NAMETOOLONG, ENAMETOOLONG },
864 { NFSERR_NOTEMPTY, ENOTEMPTY },
865 { NFSERR_DQUOT, EDQUOT },
866 { NFSERR_STALE, ESTALE },
867#ifdef EWFLUSH
868 { NFSERR_WFLUSH, EWFLUSH },
869#endif
870 /* Throw in some NFSv3 values for even more fun (HP returns these) */
871 { 71, EREMOTE },
872
873 { -1, EIO }
874};
875
876static char *nfs_strerror(int status)
877{
878 int i;
879 static char buf[256];
880
881 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
882 if (nfs_errtbl[i].stat == status)
883 return strerror(nfs_errtbl[i].errnum);
884 }
885 sprintf(buf, _("unknown nfs status return value: %d"), status);
886 return buf;
887}
888
889static bool_t
890xdr_fhandle (XDR *xdrs, fhandle objp)
891{
892 //register int32_t *buf;
893
894 if (!xdr_opaque (xdrs, objp, FHSIZE))
895 return FALSE;
896 return TRUE;
897}
898
899bool_t
900xdr_fhstatus (XDR *xdrs, fhstatus *objp)
901{
902 //register int32_t *buf;
903
904 if (!xdr_u_int (xdrs, &objp->fhs_status))
905 return FALSE;
906 switch (objp->fhs_status) {
907 case 0:
908 if (!xdr_fhandle (xdrs, objp->fhstatus_u.fhs_fhandle))
909 return FALSE;
910 break;
911 default:
912 break;
913 }
914 return TRUE;
915}
916
917bool_t
918xdr_dirpath (XDR *xdrs, dirpath *objp)
919{
920 //register int32_t *buf;
921
922 if (!xdr_string (xdrs, objp, MNTPATHLEN))
923 return FALSE;
924 return TRUE;
925}
926
927bool_t
928xdr_fhandle3 (XDR *xdrs, fhandle3 *objp)
929{
930 //register int32_t *buf;
931
932 if (!xdr_bytes (xdrs, (char **)&objp->fhandle3_val, (u_int *) &objp->fhandle3_len, FHSIZE3))
933 return FALSE;
934 return TRUE;
935}
936
937bool_t
938xdr_mountres3_ok (XDR *xdrs, mountres3_ok *objp)
939{
940 //register int32_t *buf;
941
942 if (!xdr_fhandle3 (xdrs, &objp->fhandle))
943 return FALSE;
944 if (!xdr_array (xdrs, (char **)&objp->auth_flavours.auth_flavours_val, (u_int *) &objp->auth_flavours.auth_flavours_len, ~0,
945 sizeof (int), (xdrproc_t) xdr_int))
946 return FALSE;
947 return TRUE;
948}
949
950bool_t
951xdr_mountstat3 (XDR *xdrs, mountstat3 *objp)
952{
953 //register int32_t *buf;
954
955 if (!xdr_enum (xdrs, (enum_t *) objp))
956 return FALSE;
957 return TRUE;
958}
959
960bool_t
961xdr_mountres3 (XDR *xdrs, mountres3 *objp)
962{
963 //register int32_t *buf;
964
965 if (!xdr_mountstat3 (xdrs, &objp->fhs_status))
966 return FALSE;
967 switch (objp->fhs_status) {
968 case MNT_OK:
969 if (!xdr_mountres3_ok (xdrs, &objp->mountres3_u.mountinfo))
970 return FALSE;
971 break;
972 default:
973 break;
974 }
975 return TRUE;
976}
977
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-13 05:28:20 +0000